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A close approach between two orbiting objects.

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67 views

Algorithmic methods or techniques to find conjunctions in high N Keplerian element ensembles?

Suppose I wanted to answer the question Will Starman/Roadster pass particularly close to any asteroids in the next few years? or try to predict satellite conjunctions around Earth (e.g. Celestrak's ...
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0answers
22 views

Algorithmic methods or techniques to find conjunctions in high N state vector ensembles?

Suppose I wanted to answer the question Will Starman/Roadster pass particularly close to any asteroids in the next few years? or try to predict satellite conjunctions around Earth (e.g. Celestrak's ...
1
vote
0answers
48 views

Will Starman/Roadster pass particularly close to any asteroids in the next few years?

Given what's known about Starman/Roadster's orbit (2018-017A, 43205) have there been, or are there any future predicted close passes to asteroids or comets (or anything) in the next few years? These ...
3
votes
1answer
202 views

What is the word for the period between two Mars conjunctions?

Earth and Mars have conjunctions every 15/7 of a year, or every 26 month or every 2 years. And it varies substantially from conjunction to conjunction because of orbital precessions and eccentricities....
5
votes
1answer
170 views

ISS: Procedure in case of collision warning

In case of collision warning occurring to the ISS, if ISS can't be moved the procedure is to go to a Soyuz and wait. Can anyone gives details about the procedure? Is the Soyuz hermetically closed ...
8
votes
1answer
505 views

When will 3 outer planets line up for a flyby mission next time?

All 4 outer planets line up once every 175 years. 2 of them line up at least once every orbit Jupiter makes, about every 12 years. But how often do 3 of the outer planets line up? Here's a simple ...
6
votes
1answer
106 views

Conjunction analysis for deep space missions

How rigorously is conjunction analysis (finding out the chances of hitting an asteroid or another known object) conducted for missions beyond Earth orbit? Due to larger computational resources ...
7
votes
1answer
195 views

Will Earth, ISS, or Tiangong be the first habitat closest to Juno during Earth Flyby 2013?

Just a fun question (+: Juno is approaching Earth for a gravity assist on her way to Jupiter. Her approach will bring her, at the nearest point, a mere 559KM above Earth's surface. ISS orbits just ...
16
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1answer
742 views

What is the probability of impact?

Space Track is a website dedicated to passing along information about satellites to consumers, primarily satellite operators. The information comes from the US military. In addition to providing the ...